TM11-6125-256-34
b Capacitors C7, C8, C11, and C13 on the positive (+)
e Free-wheeling diode CR14 is used to provide a path
input act as radio noise filters The same function is
for the field current during the off-time of power
performed by capacitors C9 and C12
transistor Q6.
(figs. FO-2 and FO-2.1)
a The dc motor starts out as a series motor As the
c. On the 4B48-6-A (fig. FO-2), the
armature voltage increases to the pickup voltage of relay
electrical component subassembly board,
and resistor assembly SW2, the relay closes, applying
consisting of diodes CR6 and CR22, resistors R16 and
voltage to the contacts of the current relay assembly
R17, capacitor C5, and Zener diode CR23, is a time delay
SW1 When SW1 closes, the starting series field is
circuit It allows the dc motor to come up to speed before
shorted out and the motor operates as a shunt motor
allowing dc power to be applied to the alternator field
d. On the 4B93-1-A (fig. FO-2.1),
during startup, normally open contacts
on relay and resistor assembly SW2
prevent power from being applied to the
attains normal operating speed, the
field to receive power.